MAX1790EUA+-MAX1790EUA+T-MAX1790EUA-T-MAX8715EUA+-MAX8715EUA+T Fast Delivery |IC PHOENIX CO.,LIMITED

MAX1790EUA+T ,Low-Noise Step-Up DC-DC ConvertersELECTRICAL CHARACTERISTICS(V = SHDN = 3V, FREQ = GND, T = 0°C to +85°C, unless otherwise noted. Typ ..
MAX1790EUA-T ,Low-Noise Step-Up DC-DC ConvertersMAX1790/MAX871519-1563; Rev 3; 9/05Low-Noise Step-Up DC-DC Converters
MAX1791EUB ,High-Efficiency, 10-Pin レMAX, Step-Down Controllers for NotebooksELECTRICAL CHARACTERISTICS(V = 15V, VL enabled, C = 1µF, C = 0.1µF, T = 0 to +85°C, unless otherwis ..
MAX1791EUB ,High-Efficiency, 10-Pin レMAX, Step-Down Controllers for NotebooksELECTRICAL CHARACTERISTICS(V = 15V, VL enabled, C = 1µF, C = 0.1µF, T = 0 to +85°C, unless otherwis ..
MAX1791EUB ,High-Efficiency, 10-Pin レMAX, Step-Down Controllers for NotebooksFeaturesThe MAX1762/MAX1791 PWM step-down controllers High Operating Frequency (300kHz)provide hig ..
MAX1791EUB+ ,High-Efficiency, 10-Pin µMAX, Step-Down Controllers for NotebooksApplicationsPART TEMP RANGE PIN-PACKAGENotebooks Handy-TerminalsMAX1762EUB -40°C to +85°C 10 µMAXS ..
MAX4619EUE+ ,High-Speed, Low-Voltage, CMOS Analog Multiplexers/SwitchesGeneral Description ________
MAX4620EPD ,±15kV ESD-Protected, Low-Voltage, Quad, SPST, CMOS Analog Switchesapplications. The on-resistance is♦ Guaranteed 0.5nA Leakage Current at T = +25°CA70Ω max, matched ..
MAX4620EPD ,±15kV ESD-Protected, Low-Voltage, Quad, SPST, CMOS Analog Switchesapplications and are the preferred120Ω (max) at 3Vsolution over mechanical relays in automated test ..
MAX4620ESD ,±15kV ESD-Protected, Low-Voltage, Quad, SPST, CMOS Analog Switchesapplications where current switching is♦ On-Resistance Flatnessrequired. They have low power requir ..
MAX4620EUD+ ,±15kV ESD-Protected, Low-Voltage, Quad, SPST, CMOS Analog SwitchesMAX4620/MAX4630/MAX464019-1761; Rev 0; 7/00±15kV ESD-Protected, Low-Voltage, Quad, SPST, CMOS Analo ..
MAX4621CSE ,Dual / 5 Analog SwitchesApplicationswhere current switching is required. They have lowReed Relay Replacement Military Radio ..

MAX1790EUA+-MAX1790EUA+T-MAX1790EUA-T-MAX8715EUA+-MAX8715EUA+T
Low-Noise Step-Up DC-DC Converters
General Description
The MAX1790/MAX8715 boost converters incorporate
high-performance (at 1.2MHz), current-mode, fixed-fre-
quency, pulse-width modulation (PWM) circuitry with a
built-in 0.21Ω/0.15Ωn-channel MOSFET to provide a high-
ly efficient regulator with fast response.
High switching frequency (640kHz or 1.2MHz selectable)
allows easy filtering and faster loop performance. An
external compensation pin provides the user flexibility in
determining loop dynamics, allowing the use of small, low
equivalent-series-resistance (ESR) ceramic output capaci-
tors. The device can produce an output voltage as high as
12V from an input as low as 2.6V.
Soft-start is programmed with an external capacitor, which
sets the input-current ramp rate. In shutdown mode, cur-
rent consumption is reduced to 0.1µA. The MAX1790/
MAX8715 are available in a space-saving 8-pin µMAX®
package. The ultra-small package and high switching fre-
quency allow the total solution to be less than 1.1mm high.
Applications
LCD Displays
PCMCIA Cards
Portable Applications
Hand-Held Devices
Features90% EfficiencyAdjustable Output from VINto 12V1.6A, 0.21Ω, 14V Power MOSFET (MAX1790)2.4A, 0.15Ω, 14V Power MOSFET (MAX8715)+2.6V to +5.5V Input RangePin-Selectable 640kHz or 1.2MHz Switching
Frequency0.1µA Shutdown CurrentProgrammable Soft-StartSmall 8-Pin µMAX Package
MAX1790/MAX8715
Low-Noise Step-Up DC-DCConvertersGND
FREQFB
COMP
μMAX
TOP VIEW
MAX1790
MAX8715SHDN
VIN
2.6V TO 5V
GND
FREQ
VOUT
COMP
SHDN
MAX1790
MAX8715
ON/OFFypical Operating Circuit
19-1563; Rev 3; 9/05
Pin Configuration
Ordering Information
EVALUATION KIT
AVAILABLE
PARTTEMP RANGEPIN-PACKAGE
MAX1790EUA-40°C to +85°C8 µMAX
MAX1790EUA+-40°C to +85°C8 µMAX
MAX8715EUA-40°C to +85°C8 µMAX
MAX8715EUA+-40°C to +85°C8 µMAX
µMAX is a registered trademark of Maxim Integrated Products,
Inc.
+ Denotes lead-free package.
MAX1790/MAX8715
Low-Noise Step-Up DC-DCConverters
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VIN= SHDN= 3V, FREQ = GND, TA= 0°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
LX to GND..............................................................-0.3V to +14V
IN, SHDN, FREQ, FB to GND................................-0.3V to +6.2V
SS, COMP to GND.......................................-0.3V to (VIN+ 0.3V)
RMS LX Pin Current..............................................................1.2A
Continuous Power Dissipation (TA= +70°C)
8-Pin µMAX (derate 4.1mW/°C above +70°C).............330mW
Operating Temperature Range
MAX1790EUA/MAX8715EUA........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Input Supply RangeVIN2.65.5V
VIN Undervoltage LockoutUVLOVIN rising, typical hysteresis is 40mV,
LX remains off below this level2.252.382.52V
VFB = 1.3V, not switching0.180.35MAX1790VFB = 1.0V, switching25
VFB = 1.3V, not switching0.210.35Quiescent CurrentIIN
MAX8715VFB = 1.0V, switching2.55.0
Shutdown Supply CurrentIINSHDN = GND0.110µA
ERROR AMPLIFIER
Feedback VoltageVFBLevel to produce VCOMP = 1.24V1.2221.241.258V
MAX1790040FB Input Bias CurrentIFBVFB = 1.24VMAX8715125190nA
Feedback-Voltage Line
Regulation
Level to produce VCOMP = 1.24V,
2.6V < VIN < 5.5V0.050.15%/V
MAX179070140240TransconductancegmΔI = 5µAMAX871570160240µS
Voltage GainAV700V/V
OSCILLATOR
FREQ = GND540640740FrequencyfOSCFREQ = IN100012201500kHz
FREQ = GND798592Maximum Duty CycleDCFREQ = IN84%
N-CHANNEL SWITCH
MAX17901.21.62.3
Current LimitILIM
VFB = 1V,
duty cycle =
65% (Note 1)MAX87151.82.43.4
MAX17900.210.5On-ResistanceRONMAX87150.150.35Ω
MAX17900.0120Leakage CurrentILXOFFVLX = 12VMAX8715530µA
MAX1790/MAX8715
Low-Noise Step-Up DC-DCConverters
ELECTRICAL CHARACTERISTICS
(VIN= SHDN= 3V, FREQ = GND, TA= -40°C to +85°C, unless otherwise noted.) (Note 2)
ELECTRICAL CHARACTERISTICS (continued)
(VIN= SHDN= 3V, FREQ = GND, TA= 0°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
MAX17900.300.450.65Current-Sense TransresistanceRCSMAX87150.200.300.43V/A
SOFT-START
Reset Switch Resistance100Ω
Charge CurrentVSS = 1.2V1.547.0µA
CONTROL INPUTS
Input Low VoltageVILSHDN, FREQ0.3 x VINV
Input High VoltageVIHSHDN, FREQ0.7 x VINV
HysteresisSHDN, FREQ0.1 x VINV
FREQ Pulldown CurrentIFREQ1.859.0µA
SHDN Input CurrentISHDN0.0011µA
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Input Supply RangeVIN2.65.5V
VIN Undervoltage LockoutUVLOVIN rising, typical hysteresis is 40mV,
LX remains off below this level2.252.52V
VFB = 1.3V, not switching0.35MAX1790VFB = 1.0V, switching5
VFB = 1.3V, not switching0.35Quiescent CurrentIIN
MAX8715VFB = 1.0V, switching5
Shutdown Supply CurrentIINSHDN = GND10µA
ERROR AMPLIFIER
Feedback VoltageVFBLevel to produce VCOMP = 1.24V1.2151.241.260V
MAX179040FB Input Bias CurrentIFBVFB = 1.24VMAX8715190nA
Feedback-Voltage Line
Regulation
Level to produce VCOMP = 1.24V,
2.6V < VIN < 5.5V0.15%/V
MAX179070260TransconductancegmΔI = 5µAMAX871570260µS
OSCILLATOR
FREQ = GND490770FrequencyfOSCFREQ = IN9001500kHz
Maximum Duty CycleDCFREQ = GND7892%
MAX1790/MAX8715
Low-Noise Step-Up DC-DCConverters
ELECTRICAL CHARACTERISTICS (continued)
(VIN= SHDN= 3V, FREQ = GND, TA= -40°C to +85°C, unless otherwise noted.) (Note 2)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
N-CHANNEL SWITCH
MAX17901.22.3
Current LimitILIM
VFB = 1V,
duty cycle =
65% (Note 1)MAX87151.83.0
MAX17900.5On-ResistanceRONMAX87150.35Ω
MAX17900.300.65Current-Sense TransresistanceRCSMAX87150.200.43V/A
CONTROL INPUTS
Input Low VoltageVILSHDN, FREQ0.3 x VINV
Input High VoltageVIHSHDN, FREQ0.7 x VINV
Note 1:Current limit varies with duty cycle due to slope compensation. See the Output-Current Capabilitysection.
Note 2:Specifications to -40°C are guaranteed by design and not production tested.
Typical Operating Characteristics
(Circuit of Figure 1, VIN= 3.3V, fOSC= 640kHz, TA= +25°C, unless otherwise noted.)
MAX1790 toc01
MAX1790 EFFICIENCY
vs. OUTPUT CURRENT
OUTPUT CURRENT (mA)
EFFICIENCY (%)
fOSC = 1.2MHz
L = 2.7μH
VIN = 3.3V
VOUT = 5V
fOSC = 640kHz
L = 5.4μH100010010
MAX1790 EFFICIENCY
vs. OUTPUT CURRENT
MAX1790 toc02
OUTPUT CURRENT (mA)
EFFICIENCY (%)
fOSC = 1.2MHz
L = 5.4μH
VIN = 3.3V
VOUT = 12V
fOSC = 640kHz
L = 10μH
OUTPUT CURRENT (mA)100010010
MAX1790 EFFICIENCY
vs. OUTPUT CURRENT
MAX1790 toc03
EFFICIENCY (%)
fOSC = 1.2MHz
L = 5.4μH
VIN = 5V
VOUT = 12V
fOSC = 640kHz
L = 10μH
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX1790 toc04
INPUT VOLTAGE (V)
NO-LOAD SUPPLY CURRENT (mA)
VOUT = 12V
fOSC = 1.2MHz
fOSC = 640kHz
MAX1790 OUTPUT VOLTAGE
vs. OUTPUT CURRENT
MAX1790 toc05
OUTPUT CURRENT (mA)
OUTPUT VOLTAGE (V)
fOSC = 640kHz
TA = +85°C
TA = +25°C
TA = -40°C
MAX8715 EFFICIENCY
vs. OUTPUT CURRENT
MAX1790 toc06
OUTPUT CURRENT (mA)
EFFICIENCY (%)
VIN = 5.0V
VIN = 3.3V
VOUT = 9V
fOSC = 1.2MHz
L = 6.8μH
MAX1790/MAX8715
Low-Noise Step-Up DC-DCConverters
500mA
20mA
CH1 = LOAD CURRENT, 500mA/div
CH2 = OUTPUT VOLTAGE, AC-COUPLED, 200mV/div
CH3 = INDUCTOR CURRENT, 1A/div
VOUT = 5V, fOSC = 640kHz, COUT = 47μF + 0.1μF
100μs/div
MAX1790 LOAD-TRANSIENT RESPONSE
MAX1790 toc10CH1
CH2
CH3
RCOMP = 62kΩ
CCOMP = 820pF
CCOMP2 = 56pF
100μs/div
MAX1790 STARTUP WAVEFORM
WITHOUT SOFT-START
MAX1790 toc11
CH1
CH2
CH3
CH1 = SHDN, 5V/div
CH2 = OUTPUT VOLTAGE, 5V/div
CH3 = INDUCTOR CURRENT, 1A/div
VIN = 3.3V, VOUT = 12V, IOUT = 10mA, fOSC = 640kHz
NO SOFT-START CAPACITOR, COUT = 33μF
1ms/div
STARTUP WAVEFORM
WITH SOFT-START
MAX1790 toc12
CH1
CH2
CH3
CH1 = SHDN, 5V/div
CH2 = OUTPUT VOLTAGE, 5V/div
CH3 = INDUCTOR CURRENT, 200mA/div
VOUT = 12V, IOUT = 10mA, fOSC = 640kHz,
CSS = 0.027μF, COUT = 33μF
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VIN= 3.3V, fOSC= 640kHz, TA= +25°C, unless otherwise noted.)
200mA
10mA
CH1
CH2
CH3
CH1 = LOAD CURRENT, 200mA/div
CH2 = OUTPUT VOLTAGE, AC-COUPLED, 100mV/div
CH3 = INDUCTOR CURRENT, 500mA/div
VIN = 3.3V, VOUT = 9.0V
fOSC = 1.2MHz, L = 6.8μH, COUT = 3 x 3.3μF
40μs/div
MAX8715 LOAD-TRANSIENT RESPONSE
MAX1790 toc07
RCOMP = 82kΩ
CCOMP = 750pF
CCOMP2 = 10pF
40mA
CH1
CH2
CH3
CH1 = LOAD CURRENT, 1A/div
CH2 = OUTPUT VOLTAGE, AC-COUPLED, 100mV/div
CH3 = INDUCTOR CURRENT, 500mA/div
VIN = 3.3V, VOUT = 9.0V
fOSC = 1.2MHz, L = 6.8μH, COUT = 3 x 3.3μF
10μs/div
MAX8715
PULSED LOAD-TRANSIENT RESPONSE
MAX1790 toc08
200mA
10mA
CH1
CH2
CH3
CH1 = LOAD CURRENT, 100mA/div
CH2 = OUTPUT VOLTAGE, AC-COUPLED, 200mV/div
CH3 = INDUCTOR CURRENT, 1A/div
VIN = 3V
VOUT = 12V, fOSC = 640kHz, COUT = 33μF + 0.1μF
100μs/div
MAX1790 LOAD-TRANSIENT RESPONSE
MAX1790 toc09RCOMP = 120kΩ
CCOMP = 1200pF
CCOMP2 = 56pF
MAX1790/MAX8715
Low-Noise Step-Up DC-DCConverters
MAX1790/MAX8715
Low-Noise Step-Up DC-DCConverters
2ms/div
STARTUP WAVEFORM
WITH SOFT-START
MAX1790 toc13
CH1
CH2
CH3
CH1 = SHDN, 5V/div
CH2 = VOUT, 5V/div
CH3 = INDUCTOR CURRENT, 500mA/div
VOUT = 12V, IOUT = 200mA, fOSC = 640kHz,
CSS = 0.027μF
CH1
CH2
CH3
CH1 = LX SWITCHING WAVEFORM, 5V/div
CH2 = OUTPUT VOLTAGE, AC-COUPLED, 200mV/div
CH3 = INDUCTOR CURRENT, 1A/div
VOUT = 12V, IOUT = 200mA, fOSC = 640kHz, L = 10μH;
COUT = 33μF + 0.1μF
500ns/div
SWITCHING WAVEFORM
MAX1790 toc14
MAX1790 MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
MAX1790 toc15
INPUT VOLTAGE (V)
MAXIMUM OUTPUT CURRENT (mA)
fOSC = 640kHz
VOUT = 12V
VOUT = 5V
MAX8715 MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
MAX1790 toc16
INPUT VOLTAGE (V)
MAXIMUM OUTPUT CURRENT (mA)
VOUT = 9V
fOSC = 1.2MHz
L = 6.8μH
COUT = 3 x 3.3μF
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VIN= 3.3V, fOSC= 640kHz, TA= +25°C, unless otherwise noted.)

Partno	Mfg	Dc	Qty	Available	Descript
MAX1790EUA+ \|MAX1790EUA	MAXIM	N/a	2905	avai	Low-Noise Step-Up DC-DC Converters
MAX1790EUA+T \|MAX1790EUAT	MAX	N/a	30000	avai	Low-Noise Step-Up DC-DC Converters
MAX1790EUA-T \|MAX1790EUAT	MAXIM	N/a	10000	avai	Low-Noise Step-Up DC-DC Converters
MAX8715EUA+ \|MAX8715EUA	MAXIM	N/a	1270	avai	Low-Noise Step-Up DC-DC Converters
MAX8715EUA+T \|MAX8715EUAT	MAXIM	N/a	5000	avai	Low-Noise Step-Up DC-DC Converters